CN101056960B - Phosphor and method for producing same, and light-emitting device using same and method for manufacturing such device - Google Patents

Phosphor and method for producing same, and light-emitting device using same and method for manufacturing such device Download PDF

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CN101056960B
CN101056960B CN2005800382058A CN200580038205A CN101056960B CN 101056960 B CN101056960 B CN 101056960B CN 2005800382058 A CN2005800382058 A CN 2005800382058A CN 200580038205 A CN200580038205 A CN 200580038205A CN 101056960 B CN101056960 B CN 101056960B
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fluor
activation
light
coordinate
wavelength
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CN101056960A (en
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山川昌彦
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Seoul Semiconductor Co Ltd
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Toshiba Corp
Toshiba Materials Co Ltd
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Abstract

When a phosphor for ultraviolet excitation or visible light excitation is excited by light having a wavelength within a range from 100nm to 500 nm and the emission color of the phosphor is represented by xy coordinates, the difference between the maximum value and the minimum value of the x coordinate and the difference between the maximum value and the minimum value of the y coordinate are respectively not more than 0.020. A light-emitting device comprises a light-emitting unit which contains at least such a phosphor. The light-emitting unit emits visible light when irradiated with ultraviolet or visible light emitted from an excitation source.

Description

Fluor and manufacture method thereof and light-emitting device and the manufacture method thereof of using it
Technical field
The present invention relates to employed ultraviolet ray excited type or the fluor and the manufacture method thereof of excited by visible light type and light-emitting device and the manufacture method thereof of using it in the various light-emitting devices.
Background technology
In recent years, use is popularized fast with the light-emitting device of the fluor of ultraviolet ray or excited by visible light.As concrete light-emitting device, can exemplify plasma display (PDP), liquid crystal indicator employed cold-cathode discharge lamp such as backlight, use the LED lamp (white led lamps) etc. of the white luminous type of photodiode (LED).If count a large amount of all the time luminescent lamps that use in, the demand aggravation of the fluor of ultraviolet ray excited type or excited by visible light type increases.Along with the expansion of its demand and purposes, because the popularizing and multifunction of light-emitting device, the level of fluor desired quality, particularly life characteristic (during work fluor brightness keep characteristic) further promotes.
The fluor of ultraviolet ray excited type radiates visible light (so-called luminous) by the ultraviolet ray of shining various wavelength.As ultraviolet supply source, general noble gas discharge (wavelength is mainly 147nm, 172nm), mercury (wavelength is mainly 254nm), black light (wavelength is mainly 360nm), the ultraviolet LEDs (wavelength is mainly 380nm) etc. of using are distinguished use according to the kind of applied device.For example, use noble gas discharge in the plasma display, be used for cold-cathode discharge lamp backlight and luminescent lamp and use mercury, use ultraviolet LED (sending ultraviolet LED) in the white led lamps.
Though fluor is by the luminescence-utraviolet of various wavelength, its characteristics of luminescence is a fluor inherent characteristic.For example, the Y that is used for the burn red of cold-cathode discharge lamp and luminescent lamp 2O 3: the Eu fluor can be luminous efficiently by the ultraviolet ray of 147nm, 172nm, 254nm, but luminous hardly for the ultraviolet ray of 360nm, 380nm.The BaMgAl that is used for the coloured light that turns blue of plasma display 10O 17: the Eu fluor all can be luminous efficiently by the ultraviolet ray of 147nm, 172nm, 254nm, 360nm, 380nm.
As the fluorescent material that is used for aforesaid light-emitting device, exploitation is by the various fluor of forming.For example, record the ultraviolet ray excited type fluor that is used for plasma display and rare gas discharge lamp etc. in patent documentation 1 and the patent documentation 2.The fluor of being put down in writing in these patent documentations is formed the raising that has realized luminous intensity and luminous sustainment rate by improvement respectively.Specifically, having put down in writing brightness sustainment rate after 1000 hours the continuous luminous work in the patent documentation 1 is 97% ultraviolet ray excited type fluor.
Light-emitting device in recent years expands to the various fields such as backlight of plasma display and liquid crystal indicator, and its using method is also varied.Therefore, the brightness sustainment rate after the non-stop run about 1000 hours well got final product in the past, but began the better brightness sustainment rate of requirement in recent years.Specifically, require after more than 3000 hours, for example about 5000 hours, also to have good brightness sustainment rate.Yet fluor in the past might not obtain good brightness sustainment rate under surpassing 3000 hours non-stop run.
Patent documentation 1: the Japanese Patent spy opens the 2002-348571 communique
Patent documentation 2: the Japanese Patent spy opens the 2004-203980 communique
The announcement of invention
The object of the present invention is to provide with the brightness sustainment rate after the long non-stop run is the improved fluor of life characteristic of representative and manufacture method thereof and light-emitting device and the manufacture method thereof of using it.
The related fluor of a kind of form of the present invention is the fluor with ultraviolet ray or excited by visible light, it is characterized in that, when the illuminant colour after aforementioned phosphors excited with the wavelength in 100nm～500nm scope was represented with the xy system of coordinates, the maximum value of the maximum value of x coordinate and the difference of minimum value and y coordinate and the difference of minimum value be not below 0.020.
The manufacture method of the fluor that another kind of form of the present invention is related is characterised in that, possess and fluor excited and measure operation with the wavelength in 100nm～500nm scope based on the illuminant colour of each wavelength, and when selecting aforementioned illuminant colour to represent with the xy system of coordinates difference of the maximum value of the difference of the maximum value of x coordinate and minimum value and y coordinate and minimum value not in the operation of the fluor below 0.020.
The related light-emitting device of another kind of again form of the present invention is characterised in that, possess the excitaton source of UV-light of emitting or visible light and the aforementioned ultraviolet ray of being emitted from aforementioned excitaton source or excited by visible light and send the luminescent part of visible light, the maximum value of the maximum value of described luminescent part contains illuminant colour after exciting with the wavelength in 100nm～500nm scope at least when representing with xy system of coordinates x coordinate and the difference of minimum value and y coordinate and the difference of minimum value be not at the fluor below 0.020.
The manufacture method of the light-emitting device that another kind of again form of the present invention is related is characterised in that, possess fluor excited and measures operation based on the illuminant colour of each wavelength with the wavelength in 100nm～500nm scope, the difference of the maximum value of the difference of the maximum value of x coordinate and minimum value and y coordinate and minimum value is not used aforementioned selected fluor to make to be emitted from excitaton source in the operation of the fluor below 0.020, at least when selecting aforementioned illuminant colour to represent with the xy system of coordinates ultraviolet ray or excited by visible light and send the operation of the luminescent part of visible light.
The simple declaration of accompanying drawing
Fig. 1 is the sectional view based on the structure of the LED lamp of a kind of embodiment of light-emitting device of the present invention.
Fig. 2 is the partial section based on the structure of the luminescent lamp of the another kind of embodiment of light-emitting device of the present invention.
The explanation of symbol
1...LED lamp, 2...LED chip, 3... pin, 4... substrate, 5... wire, 6... resin frame, 7... reflecting layer, 8... transparent resin, 9... fluor, 11... luminescent lamp, 12... glass lamp, 13... fluorescent screen, 14... stem stem portion.
The best mode that carries out an invention
Below, describe being used to implement mode of the present invention.Fluor based on embodiments of the present invention is made of the fluorescent material with ultraviolet ray or excited by visible light.So long as the fluor of ultraviolet ray excited type or excited by visible light type, composition is not particularly limited.Illuminant colour also is not particularly limited, can be in emitting red light, blue-light-emitting, the green emitting any, perhaps according to circumstances also can be Yellow luminous etc.
For example, can use various fluor such as Eu activation rare-earth oxide fluor, Eu activation rare earth class oxysulfide fluor, Eu activation rare earth class borate fluorinate, Eu activation chlorate MClO 3 fluorescent substance, Eu activation halogen-phosphate fluor, Mn activated silicic acid zinc fluor, Eu and Mn activation chlorate MClO 3 fluorescent substance, Eu activation alkali earths silicate phosphor, Tb activation rare earth class silicate phosphor, Tb activation rare earth class borate fluorinate, Tb activation rare earth class phosphate fluophor.In addition, activator is suitably selected according to illuminant colour.Fluor can be in ultraviolet ray excited type and the excited by visible light type any, the ultraviolet ray excited type fluor that various wavelength is used as excitaton source is effective especially.
The fluor of this embodiment satisfies illuminant colour (based on the illuminant colour of each wavelength) after exciting with the wavelength in 100nm～500nm scope when representing with the xy system of coordinates, and the maximum value of the maximum value of x coordinate and the difference of minimum value and y coordinate and the difference of minimum value be not below 0.020.If adopt such fluor, then can obtain good brightness sustainment rate.Promptly, if composition regardless of fluor, the maximum value of the maximum value of the x coordinate of the illuminant colour after exciting with the wavelength in 100nm～500nm scope and the difference of minimum value and y coordinate and the difference of minimum value then can obtain to have the fluor of good brightness sustainment rate all respectively below 0.020.
As previously mentioned, fluor is formed according to it and is excited by certain wavelengths and luminous.Therefore, only carry out the inspection of illuminant colour with excitation wavelength in the past.Yet, only, not necessarily can pick out the good fluor of characteristic by the inspection of specific wavelength.For example, for ultraviolet ray excited fluor, fluorophor particle absorbs the ultraviolet ray shone, and in this particle Conversion of energy takes place, and sends the visible light of the wavelength of the energy level that is equivalent to the activator that added.If ultraviolet wavelength difference, then take place in the intravital excitation band of fluorescence that absorbs and the particle the ultraviolet radiation absorption position, concrete promptly the distance with the surface is different, finally influences the luminous of self-activation agent.
The deviation of the illuminant colour of the fluor that life characteristic is good in the known luminescence device after the ultraviolet ray of the various wavelength of irradiation is little, and the deviation of the illuminant colour of the fluor of life characteristic difference after the ultraviolet ray of the various wavelength of irradiation is big.That is, even the ultraviolet radiation absorption position in phosphor excitation band and the fluorophor particle changes, can not influence the characteristics of luminescence yet, be that the fluor of illuminant colour is considered to be crystallization-stable and the few structure of defective that life characteristic is good.On the contrary, if the ultraviolet radiation absorption position in phosphor excitation band and the fluorophor particle changes, then can influence the characteristics of luminescence, be that the fluor of illuminant colour is considered to be crystallization instability and the many structures of defective that life characteristic is bad.
In addition, fluor constitutes with all cpds such as metal oxide, aluminate, borates.Each fluor is mixed into the target ratio of components.Fluor in the past is to be mixed into the target ratio of components.Yet,, still have deviation from atomic levels such as lattice parameters even confirmed that actual fluor ratio of components is identical.That is, clear and definite crystalline state instability, defective is many.
When lattice parameter exists deviation to be meant to be the unit fluorophor particle with one, for example the surface of fluorophor particle with inner on lattice parameter, occur different.In addition, if between fluorophor particle, compare,, also present the mutual blended state of fluor that there is deviation in lattice parameter even also the expression ratio of components is identical.Confirmed that when the fluor of such state shone the exciting light of provision wavelengths, because the lattice parameter difference, different (the absorbing state difference of exciting light) appearred in the excited state in each fluor.
Therefore, when the characteristic of fluor that the characteristics of luminescence is subjected to the influence of crystalline state etc. is estimated, not only measure illuminant colour based on single wavelength, and in certain wavelengths scope (being specially the scope of 100nm～500nm), measure illuminant colour, poor based on the maximum value of the difference of the maximum value of the x coordinate of the illuminant colour of each wavelength and minimum value and y coordinate and minimum value at this moment importantly.That is, measure illuminant colour in the wavelength region of the wide cut of 100nm～500nm, the maximum value of the maximum value of the little x coordinate by this of deviation and the difference of minimum value and y coordinate and the difference of minimum value under 0.020 situation, can not obtain good brightness sustainment rate.
In other words, in the maximum value of the maximum value of the x coordinate of above-mentioned illuminant colour and the difference of minimum value and y coordinate and the difference of minimum value, the either party surpasses at 0.020 o'clock, shows that promptly the internal structure based on crystalline state and lattice parameter etc. of fluor produces deviation.This is the low major reason of brightness sustainment rate.Here, the wavelength that uses in the evaluating characteristics of fluor selects the reason of the scope of 100nm～500nm to be, ultraviolet ray and wavelength of visible light comprise this scope.That is,, therefore use the wavelength in 100nm～500nm scope so long as, just comprise all excitation wavelengths by the fluor of ultraviolet ray or excited by visible light.
The fluor of this embodiment is for example following to be made.At first, with the different wave length excited fluophor in 100nm～500nm scope, use the illuminant colour of measuring fluor based on the method for cie color coordinate.Try to achieve illuminant colour with the form of xy coordinate figure based on the fluor of each wavelength.Measuring wavelength is that unit is selected with 50nm, for example 100nm, 150nm, 200nm ..., 500nm.Can in the scope littler, select to measure wavelength, but, can estimate the life characteristic of fluor fully in the scope of 100nm～500nm by being that unit is selected with 50nm than this.
According to the illuminant colour (xy coordinate figure) of the fluor that records based on above-mentioned method, try to achieve maximum value and minimum value in the x coordinate, calculate poor (maximum value of x coordinate and the difference of minimum value are called poor (A)) of these two values.Similarly, try to achieve maximum value and minimum value in the y coordinate, calculate poor (maximum value of y coordinate and the difference of minimum value are called poor (B)) of these two values.Based on this result, poor (A) of selection x coordinate and poor (B) of y coordinate are at the fluor below 0.020.The fluor of Xuan Zeing is formed regardless of it like this, all demonstrates good brightness sustainment rate.
If adopt the manufacture method of above-mentioned fluor,, can obtain to demonstrate the fluor of good brightness sustainment rate regardless of the composition of fluor.In addition, the life characteristic when in the past fluor being used for light-emitting device is all unknown before the light-emitting device of packing into, but by using the manufacture method of this embodiment, can estimate and check its characteristic under the state of fluorophor powder.This not only helps the long lifetime of light-emitting device, and is very beneficial for the raising of reliability.In addition, the mensuration of the illuminant colour of fluor (inspection of fluor) can be implemented more than ground of fluor, also can implement together about 0.1～5kg.
The fluor of this embodiment can obtain based on above-mentioned selection operation.In addition, when making the fluor of this embodiment, the deviation etc. of using manufacturing process shown below to suppress the crystalline texture of fluor also is effective.That is, the major cause as the deviation of the crystalline textures such as lattice parameter of fluor can exemplify the unhomogeneity of raw material powder, a variety of causes such as deviation of blending process.The sintering temperature when for example, all the time adopting the purity of raw material powder and particle diameter, blending and the control of sintering time.Yet known to only depend on these be not enough.
During the sintering fluor, the raw material powder of disposable mixed number kg will carry out sintering in its adding sintered crucible.Even carry out sintering with identical sintering temperature and sintering time, also there is deviation in the heat that is transmitted in the crucible.If there is deviation in the heat that is transmitted in the crucible, then on the heat of conduction, produce difference between the fluor of the fluor of the inwall of close crucible and close central authorities.Therefore, even with the fluor of same ratio of components blending, also can produce the deviation of atomic level such as lattice parameter.In addition, the difference of lattice parameter can be confirmed by tem observation.
When making the fluor of this embodiment, aspect the above-mentioned deviation of inhibition, better be the thermal conduction homogenization that makes in the crucible.Specifically, can exemplify the crucible that uses thermal conductivity good, make be filled in the raw material powder in the crucible amount at crucible volumetrical 1/2 with inferior method.As the good crucible of thermal conductivity, can exemplify the crucible of refractory metals such as tungsten, molybdenum, tantalum or their alloy system.In addition, below 1/2, the thermal conduction homogenization of the inwall side and the center side of crucible can be made at the crucible volumetrical, the generation of sintering inequality can be suppressed by making the amount that is filled in the raw material powder in the crucible.
Be suitable as the fluor of the luminescent part that constitutes light-emitting device based on the fluor of embodiments of the present invention.When making light-emitting device, better be that the fluor that constitutes luminescent part all uses the fluor of this embodiment, but also fluor and other fluor (fluor that the scope of the invention is outer) of this embodiment can be used in combination.Make up multiple fluorophor powder as under the situation of fluor group,, the life characteristic of light-emitting device is improved if more than the 70 quality % of the content of the fluorophor powder of this embodiment in all fluor.
Below, the embodiment of light-emitting device of the present invention is described.Possess the excitaton source of UV-light of emitting or visible light and sent the luminescent part of visible light by the ultraviolet ray of emitting from this excitaton source or excited by visible light based on the light-emitting device of embodiments of the present invention, such luminescent part is made of the fluor group of the fluor of this embodiment or itself and other fluor combination.As the object lesson of such light-emitting device, can exemplify luminescent lamp, cold-cathode discharge lamp, plasma display, LED lamp etc.The excitaton source of LED lamp uses led chip or laser diode luminous semiconductor devices such as (semiconductor lasers).Therefore, the LED lamp also can be called semiconductor lamp.
Fig. 1 is for being used for light-emitting device of the present invention the sectional view of structure of a kind of embodiment of LED lamp.Light-emitting device shown in this figure (LED lamp) 1 has led chip 2 as excitaton source.In addition, the excitaton source of light-emitting device 1 is not limited to led chip 2, can also be laser diode (semiconductor laser) etc.Led chip 2 is installed on the substrate 4 with pair of pins 3a, 3b.The lower electrode of led chip 2 also mechanically is connected with pin 3a conduction.The upper electrode of led chip 2 is connected with pin 3b conduction by wire 5.
LED lamp 1 uses and for example sends the light source of UV-light as excitaton source.Therefore, excitaton source uses the led chip 2 that sends UV-light.The led chip 2 representational emission wavelengths of such ultra-violet light-emitting type with 360～420nm scope.As ultra-violet light-emitting led chip 2, can exemplify led chip with the luminescent layer that constitutes by nitride-based compound semiconductor layer.In addition, as long as the emission wavelength of led chip 2 can be based on obtaining the illuminant colour of target with the combination of fluor.Therefore, be not limited to the led chip of emission wavelength in 360～420nm scope.In addition, can use luminous semiconductor device (laser diode etc.) except that led chip as excitaton source.
Substrate 4 is provided with resin frame 6 cylindraceous, and inner wall surface thereof 6a is formed with reflecting layer 7.Be filled with transparent resin 8 in the resin frame 6, imbedded led chip 2 in this transparent resin 8.Led chip 2 is covered by transparent resin 8.The transparent resin 8 of having imbedded led chip 2 contains the fluor 9 of ultraviolet ray excited type.The fluor 9 that is scattered in the transparent resin 8 is sent visible light from the light of led chip 2 radiation, for example ultraviolet excitation.
The transparent resin 8 that contains fluor 9 plays the effect of luminescent part, is disposed at light emission direction the place ahead of led chip 2.Transparent resin 8 uses for example silicone resin or Resins, epoxy etc.As the fluor 9 that constitutes such luminescent part, use the fluor or the fluor group of above-mentioned embodiment.The life characteristic of the fluor of above-mentioned embodiment and fluor group (brightness sustainment rate) is good, so also can realize long lifetime as light-emitting device.Particularly carry out under the situation of long non-stop run, for example more than 3000 hours or even under the situation of the non-stop run more than 5000 hours, the brightness that can suppress light-emitting device (LED lamp 1) descends.In other words, be suitable for often lighting the light-emitting device of use.
In addition, the kind and the combination that are scattered in the fluor 9 in the transparent resin 8 are suitably selected according to the illuminant colour of the LED lamp of target, are not particularly limited.For example, use under the situation of LED lamp 1 as the LED lamp (white led lamps) of white luminous type, use the mixture of blue-light-emitting fluorescent material, green emitting fluor and red light-emitting phosphor.Obtain under the situation of white illuminant colour in addition, can use from the fluor of combination more than a kind or 2 kinds such as blue-light-emitting fluorescent material, green emitting fluor, red light-emitting phosphors.
Fig. 2 is for being used for light-emitting device of the present invention in the synoptic diagram of structure of a kind of embodiment of luminescent lamp.Luminescent lamp 11 shown in this figure possesses glass lamp 12.The inner surface side of glass lamp 12 is formed with fluorescent screen 13.This fluorescent screen 13 contains the fluor or the fluor group of above-mentioned embodiment.That is, the lining of the internal surface of glass lamp 12 is formed with as the fluorescent-lamp-use fluor as three-wavelength type fluor and contains the fluor of above-mentioned embodiment or the fluorescent screen 13 of fluor group.Fluorescent screen 13 constitutes luminescent part.
The both ends sealing-in stem stem 14 of glass lamp 12 is as the electrode sealing.Inclosure has the mercury of specified amount and the rare gas of specified pressure to use gas as discharge in such glass lamp 12, constitutes luminescent lamp 11 by them.In the luminescent lamp 11, the electrode at both ends is applied the voltage of regulation, make it produce positive column discharge,, thereby mainly obtain visible light with ultraviolet ray excited fluorescent screen 12 by this discharge generation.That is, enclose the excitaton source that glass lamp 12 interior mercury become fluorescent screen 13.
In the luminescent lamp 11 of above-mentioned embodiment, the life characteristic (brightness sustainment rate) of the fluor of formation fluorescent screen 13 is good, so also can realize long lifetime as luminescent lamp 11.Particularly carry out under the situation of long non-stop run, for example more than 3000 hours or even under the situation of the non-stop run more than 5000 hours, the brightness that can suppress luminescent lamp 11 descends.The life-span of such light-emitting device improves effect and is not limited to LED lamp 1 and luminescent lamp 11, also can obtain equally for plasma display (PDP) and cold-cathode discharge lamp.
Below, specific embodiment of the present invention and evaluation result thereof are described.
[sample 1～36]
At first, prepare to form each 1kg of fluor that is shown in table 1～3.Then, measure the x coordinate and the y coordinate of the illuminant colour when exciting, try to achieve poor (A) and the maximum value of y coordinate and poor (B) of minimum value of the maximum value and the minimum value of x coordinate with the wavelength in 100nm～500nm scope.Measuring wavelength is that unit is selected with 50nm from 100nm～500nm.Poor (A) of selection x coordinate and poor (B) of y coordinate are at the fluor below 0.020, as the fluor of embodiments of the invention.Poor (B) of poor (A) of x coordinate and y coordinate surpassed 0.020 fluor as a comparative example.
Use the fluor of each embodiment and comparative example, make the light-emitting device shown in table 1～3 respectively.The luminescent part of each light-emitting device 100% uses the fluor of each embodiment and comparative example to make respectively.Measure the brightness sustainment rate of each such light-emitting device.For the brightness sustainment rate, measure initial luminosity L when luminous respectively 0, the luminosity L after lighting continuously 1000 hours 1, the luminosity L after lighting continuously 5000 hours 2, try to achieve respectively initial stage luminosity L 0Be made as 100 o'clock luminosity L 1With luminosity L 2Ratio separately.These values are shown in table 1～3.
[table 1]
Figure G05838205820070510D000081
[table 2]
Figure G05838205820070510D000091
[table 3]
Adopt the light-emitting device of each embodiment to confirm after 1000 hours, the brightness sustainment rate after 5000 hours is all good.On the other hand, adopt the brightness of the light-emitting device of comparative example to decline to a great extent.Hence one can see that, if adopt each embodiment, though composition is identical with comparative example, poor (A) of x coordinate and poor (B) of y coordinate demonstrate good characteristic at the fluor below 0.020.Thus, if use manufacture method of the present invention (inspection method), can only pick out the good fluor of characteristic.
[sample 37～49]
Then, the situation that the ratio (quality %) of fluor is changed is studied.Poor (B) for preparing poor (A) of x coordinate and y coordinate is 0.025 fluor (II) in the fluor below 0.020 (I) and these values.Fluor (I) and fluor (II) are mixed with the ratio shown in the table 4 (quality %), be respectively applied for light-emitting device.Then, measure L with aforesaid method 1/ L 0, L 2/ L 0, estimate.In addition, as fluor, all samples all use (Ba, Sr) MgAl 10O 17: the Eu fluor.
[table 4]
Figure G05838205820070510D000111
As shown in Table 4, by all constituting luminescent part, the life-span (brightness sustainment rate) as light-emitting device is improved at the fluor of content more than 70 quality % of the fluor below 0.020 with poor (A) of x coordinate and poor (B) of y coordinate.
The possibility of utilizing on the industry
Fluorophor of the present invention and use its life characteristic of light-emitting device good. In addition, if adopt manufacture method of the present invention, can repeatability provide well the good fluorophor of life characteristic and light-emitting device. Therefore, the present invention can be used for various light-emitting devices.

Claims (4)

1. the manufacture method of fluor, it is characterized in that, possessing fluor is that each wavelength of unit excites and measure operation based on the illuminant colour of each wavelength with the 50nm in 100nm～500nm scope, and when selecting aforementioned illuminant colour to represent with the xy system of coordinates respectively based on each wavelength the difference of the maximum value of the difference of the maximum value of x coordinate and minimum value and y coordinate and minimum value not in the operation of the fluor below 0.020
Described fluor is to be selected from Eu activation rare-earth oxide fluor, Eu activation rare earth class oxysulfide fluor, Eu activation rare earth class borate fluorinate, Eu activates chlorate MClO 3 fluorescent substance, Eu activation halogen-phosphate fluor, Mn activated silicic acid zinc fluor, Eu and Mn activation chlorate MClO 3 fluorescent substance, Eu activation alkali earths silicate phosphor, Tb activation rare earth class silicate phosphor, Tb activation rare earth class borate fluorinate, and Tb activation rare earth class phosphate fluophor is at least a.
2. the manufacture method of light-emitting device, it is characterized in that, possessing fluor is that each wavelength of unit excites and measure operation based on the illuminant colour of each wavelength with the 50nm in 100nm～500nm scope, the difference of the maximum value of the difference of the maximum value of x coordinate and minimum value and y coordinate and minimum value is not in the operation of the fluor below 0.020 when selecting aforementioned illuminant colour based on each wavelength to represent with the xy system of coordinates respectively, at least ultraviolet ray of using aforementioned selected fluor to make to be emitted or excited by visible light and send the operation of the luminescent part of visible light from excitaton source
Aforementioned phosphors is to be selected from Eu activation rare-earth oxide fluor, Eu activation rare earth class oxysulfide fluor, Eu activation rare earth class borate fluorinate, Eu activates chlorate MClO 3 fluorescent substance, Eu activation halogen-phosphate fluor, Mn activated silicic acid zinc fluor, Eu and Mn activation chlorate MClO 3 fluorescent substance, Eu activation alkali earths silicate phosphor, Tb activation rare earth class silicate phosphor, Tb activation rare earth class borate fluorinate, and Tb activation rare earth class phosphate fluophor is at least a.
3. the manufacture method of light-emitting device as claimed in claim 2, it is characterized in that, aforementioned luminescent part in the difference of the maximum value of the difference of maximum value that contains aforementioned x coordinate with respect to the scope more than the 70 quality % of the total amount of the fluor that is included in described luminescent part and minimum value and y coordinate and minimum value not at the fluor below 0.020.
4. the manufacture method of light-emitting device as claimed in claim 3 is characterized in that, aforementioned light-emitting device is to be selected from luminescent lamp, cold-cathode discharge lamp, plasma display and LED lamp a kind.
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